| 摘要 |
The present invention refers to a method of manufacturing an R-T-B-M-C sintered rare earth magnet comprising the process steps of:
a) charging an R-T-B-M-C alloy powder including a lubricant into a mold cavity with a predetermined density, wherein
R is at least one rare earth element including Y and Sc,
T is iron or a mixture of iron and cobalt, and
M is at least one element selected from Ti, Ni, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Cu, Ga, Mo, W and Ta,
and the weight contents of these components are in the ranges 25 % ‰¤ R ‰¤ 40 %, 60 % ‰¤ T ‰¤ 74 %, 0 % ‰¤ M ‰¤ 2 %, 0.8 % ‰¤ B ‰¤ 1.2 %, 0.03 % ‰¤ C ‰¤ 0.15 %;
b) applying a magnetic field to the powder filled in the mold cavity under a pressure in the range of 0.2 to 2 MPa; and
c) sintering the same under inert gas followed by an additional heat treatment. |
